海排灰在道路水泥稳定类碎石材料基层中的应用

Research on the Application of Cement Fly-Ash-Flushed-by-Seawater Stabilized Aggregate for Roadway Basic Layer

目的通过对海排灰原材料的物理力学性能试验和基于海排灰的二灰混合料的配合比设计的研究,为海排灰应用于道路基层提供可靠的理论和实践依据.方法进行配合比设计以及最佳配合比条件下不同含盐量对抗压强度的影响分析.结果在进行的6组试件中只有一组早期强度为1.27 MPa不能满足规范7 d强度大于1.5 MPa的要求,其他各组都能满足强度大于1.5 MPa的要求.海排灰中不同的氯盐含量对水泥海排灰碎石强度有影响:当二灰混合料中海排灰的氯盐含量在1.3%左右时,混合料28 d强度最高.当海排灰中氯离子含量大于1.3%时,二灰试件浸水后,氯离子融解到水中而使试件变疏松,强度会有所下降,但还能满足规范要求.结论海排灰中的氯盐含量对二灰混合料路用性能有一定影响,但能满足规范要求,可安全用于营口沿海产业基地路面基层.

The study is about physics mechanical properties of the fly-ash-flushed-by-seawater, and mixture ratio design of the cement fly-ash-flushed-by-seawater stabilized crushed-stones, which offers the theory for the application of the fly-ash-flushed-by-seawater. The results showed that only team ＂a＂ couldn＇t satisfy a norm intensity request and all the other five can. The chloride ion content in the two ash stabilized roadbases functions as an agent to the early strength. When the chloride ion content was around 1.3 %, 28 d intensities of the cement fly-ash-flushed-by-seawater stabilized crushed-stones were maximal. When the salt content in fly-ash-flushed-by-seawater was too big, it was disadvantageous for two ash stabilized crushedstones＇s early strength. So, if the salt content of the fly-ash-flushed -by-seawater is optimum, the fly-ashflushed -by-seawater can be used for roadbases.